I am trying to activate my drop down menus. Right now I have a list of topics. Under each one I want to be able to add sub categories. When I add a sub category in WP, I select the parent category before saving.

However, they do not appear under the parent category in the menu.

When I select these categories and add to menu in WP, they just get listed as normal categories, not as sub menus.

I have managed to remove the top navigation thanks to the link you sent me too.

However, I still cant get the drop down menus. I have several categories and selected what the main category is when creating them. However, there is no way of dragging and dropping them under other categories – they just appear as top level categories.